ATM-Ethernet portal/concentrator
US5457681A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 5, 1992 |
| Grant date | Oct 10, 1995 |
| Priority date | — |
| Expiry date | Jun 5, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/5665
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An ATM-Ethernet portal/concentrator permits a transparent interconnection between Ethernet segments over an ATM network to provide remote connectivity for Ethernet segments. The portal includes an Ethernet controller and an ATM cell processor, both of which receive and transmit data to and from a dual port shared memory under control of a direct memory access controller. A control microprocessor monitors and controls the shifting of data through the dual port memory. In this scheme, original data is written and read directly into and out of the dual port memory to thereby eliminate any requirement for copying of data, to thereby significantly increase the data throughput capability of the portal. In the concentrator embodiment, a plurality of Ethernet controllers, each of which is connected to its own associated Ethernet segment, is multiplexed through the concentrator to an ATM network to thereby provide remote connectivity for each of the Ethernet segments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.